[PATCH V2 0/2] dmaengine: Support for IMG MDC

[Andrew Bresticker]

This series adds support for the IMG Multi-threaded DMA Controller (MDC)
which is found on IMG SoCs.  Currently this driver only supports the
variant found on the MIPS-based Pistachio SoC.

The MDC supports slave and memory-to-memory transfers on up to 32 channels.
Requests from channels are handled by MDC threads.  Thread assignments are
per-channel and are specified in the device-tree.

Tested on a platform based on the Pistachio SoC with additional patches.
Support for Pistachio will be submitted later.  Slave DMA was tested
with the recently submitted IMG SPFI driver [1] and memory-to-memory
DMA was tested with the dmatest module.

Based on Vinod's slave-dma/next + Maxime's device_control and slave caps
cleanup series [2].

Changes from v1:
 - addressed Arnd's review comments
 - rebased on Maxime's dmaengine cleanups

[1] https://lkml.org/lkml/2014/11/12/763
[2] https://lkml.org/lkml/2014/10/28/1067

Andrew Bresticker (2):
  dmaengine: Add binding document for IMG MDC
  dmaengine: Add driver for IMG MDC

 .../devicetree/bindings/dma/img-mdc-dma.txt        |  57 ++
 drivers/dma/Kconfig                                |   9 +
 drivers/dma/Makefile                               |   1 +
 drivers/dma/img-mdc-dma.c                          | 973 +++++++++++++++++++++
 4 files changed, 1040 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/img-mdc-dma.txt
 create mode 100644 drivers/dma/img-mdc-dma.c

-- 
2.1.0.rc2.206.gedb03e5

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